Throttle-lever mechanism.



F. E'. RUSSELL.

THROTTLE LEVER MECHANISM.-

APPLICATION FILED SEPT. 9, I915,

2 SHEETS-SHEET l.

Patented Jan. 4, 916] F. E. RUSSELL.

'nmoma LEVER MECHANISM.

APPLICATION FILED SEPT. 9, I915.

Patented Jam.- 4,1916.-

vide a stulling box yoke. 7, having a trans-- OFFICE. I

FRANK E. RUSSELL, OF ALAMEDA, .QALIFORNIA.

THROTTLE-LEVER MECHANISM.

To all whom it may concern-L1 Be it known that I, FRANK E. RUssnLL, ofAlameda, in the county of Alameda and State of California, have inventeda certain new and usefulIm rovement in Throttle- Lever Mechanism, ofwhich improvement the following is a specification. j

The object of my invention is to provide means whereby the accurate andpositive graduation of a throttle valve may be effected; theobjectionable results of imperfective latching of the throttle lever beprevented; and proper alinement of the working parts of the valveoperating mechanism,

' with elimination of unnecessary friction, be

insured.

leverand the throttle stem; vFig. 5, a rearview of the stuffing boxyoke; Fig. 6, a plan view, on an enlarged scale, of the latch and iide'and Fi 7 a horizontal section.

through the same.

Referring to the drawings, my invent on is herein exemplified as appliedfor the operation of a balanced puppet throttle valve, 1, which isseated, in the ordinary manner, at the top of a vertical throttle pipe,2,

which is supported in the dome, 3, of a locomotive boiler, andcommunicates, at its bottom, with the dry pipe or main supply pipe, 4,the throttle valve controlling, as

usual, communication between the steam space within the boiler and domeand the interior of the throttle pipe and dry pipe. The throttle valveis coupled to a throttle stem, 5, which extends rearwardly and outwardlythrough a stuliing'box, G, secured to the rear head, 3 of the boiler.

In the practice of my invention, I -proverse opening, 7*, which fitsaround the outer portion of the stullmg box. the yoke abutting againstthe inner portion thereof and being secured thereto, transversely to theSpecification of Letters Patent.

.throttle stem, 5,, by the bolts, 6", and nuts,

6, which compress the gland 6, on the packmg. A segment, 8, on the outerside of Patented J an.4, 1916.

Application filed September 9,4915. Serial 170.49,?93.

which there is formed a plurality oftee'th,

S, is secured, by bolts, 8", to one end of the yoke, 7', and a fulcrumbar, 9, is secured, by bolts, 9,'to the opposite end of the yoke. Athrottle lever, 10, having a; handle, 10*}, on its outer or freeend,.ispivoted, at its'opposite, end, to the 'fulcrum bar, by a pin,- 10 Alatch lever, 11, having a handle, 11, is coupled to the throttle leverby a link, 11", the connection of the .two levers being made so thatthcirhandles adjoin each other and can be coin'cidently grasped by theengineman. A latch, 12, having a plurality of teeth, 12", on one of itsends, adapted to engage the teeth of the segment, 8,.is connected, by apin, 12", to the inner endof the latclrlever, 11, and is fitted toslidebetween the throttle lever, 10, and a latch guide, 13, secured tothethrottle lever by a bolt, 13. The latch is normally, or except whenreleased by movement of the latch lever, held in engagement with thesegmentjby a spring, 14, fitted in a longitudinal slot in the latch. andabutting against the bolt; 13. The latch guide serves also as'a guide orkeeper for the throttle lever and prevents it from being thrown orlifted out of position.

A substantially U-shaped throttle lever yoke, 15, is secured to theo'uterend'of the -tle lever, 10 is coupled to the opposite end of theyoke through'the intermediation ofa link, 16, one end of which ispivoted to the yoke, by a' pin, 16", and the other to the throttlelever, by a pin, 16". This construction converts the curved lIlL :ementof the throttle lever into rectilineal movement of the throttle stem,eliminating, unnecessary movement of the latter, and relieving strainupon the packing of the stuffing box, which needs to be onlysulliciently tight to maintain a steam tight joint around the stem.

The throttle lever may be adjusted to any desired height or angle, bychanging the location ot the stulling box bolts. and in the event ofrepairs being required, it is only necessary to remove said bolts andthe key by which the throttle lever yoke is secured to the throttlestem, upon which the entire throttle lever nmchanism nay be detached. Ifit is required to continue the locomotive in service while repairs tothe throttle lever 1 stem, a yoke throttle stem in the stuthng positeend of said bination of a of said yoke, a segz'nent secured voke, and athrottle lever mechanism being made, a spare mechanism may besubstituted and delay correspondingly avoided.

Among the advantages which have been developed in practical service bymy invention, there may he noted the capacity of ac curate and. positivegraduation of the Within one tenth of valve he elimination of thefloating the throttle lever which has been experienced with priorconstructions, rendering it unnecessary for the engineman to use astick, wrench, or other device for holding the throttle valve in anydesired posi- Further, cramping action of the box is eliminated, bywhich the life 01 the packing is increased, and the throttle valve isrendered more easily operable. 'l. he connection of the throttle leversegment and its fulcrum by the stufiing box yoke insures properalinement of the Working parts andeliminates uzn'iecessary friction, andenables all parts to he assembled in the machine shop, reducing to theminimum the Work in the erecting shop or round house. Adjustment of thethrottle lever to desired height is permitted without involving changeof detail parts.

I claim my invention and desireto secure by Letters Patent:

1. In a throttle lever mechanism, thecombination of a longitudinallymovable throttle stem, a fixed yoke extending transversely thereto, afulcrum bar secured to one end of Said y kc, a segmentsecured. to the opyoke, and a throttle lever pivoted to the fulcrum bar and Working overthe segment.

2. In a throttle lever mechanism, the comlongitudinally movable throttlestem, a stuffing box surrounding said detachably secured to saidextending transversely to secured to one end to the op stuffing box andsaid stem, a fulcrum bar posits end of said pivoted to the fulcrum barover the segment.

and Workin g eagles of this patent may be obtained for five cents each,Washington, D.

In a throttle lever mechanism," the combination of a: longitudinallymovable throttle stem, a stu .ing box surrounding said stem, a glandfitting in the stufling box, bolts connecting said gland to the'stuliiugbox, a yoke detachably connected to said bolts and extendingtransversely to the throttle stem, ,1

to one endof sa d a fulcrum bar secured v yoke, segment secured to theopposite end of said yoke, and a throttle-lever pivoted to the fulcrumbar and working over the segment. 4 l. In a throttle lever mechanism,the combination of a longitudinally movable throttle stem, a stu "ng boxsurrounding said stem,- a yoke fitting stulling boX and extendingtransversely to the stem, a segment fixed to one end of the voke,-and athrottle lever coupled to the opposite end of the yoke and to thethrottle stem. In a throttle lever mechanism, the combination of alongitudinally movable throttle stem, a fixed yoke extendingtransversely thereto, to one end of said yoke, a segment secured to theopposite end. of said yoke, a throttle lever pivoted to the fulcrum barand Working over the segment, a yoke fixed to the throttle stem, and a;link coupled to said yoke and to the throttle 6. In a throttle levermechanism, the combination of a longitudinally movable throtyokeextending transversely a tulcrumbar secured to one end of said yoke, a.segment secured to the opposite end of said yoke, a throttle leverpivoted to the fulcrum bar and working over the segment, a latch guidesecured to the throttle ever and fitting on the" side of the segmentopposite the a spring latch adapted to traverse between the throttlelever and guide, and a latch lever coupled to said latch and to thethrottle lever.

FRANK E. RUSSELL. Witnesses: Wrnrmw Prooron SMITH,

M. CRAMER.

by addressing C.

the Commissioner of Patents.

DISCLAIMER- 1,166,787.Fmn7c E. Russell, Alameda, Cal. TI-IReTTLE-LEVERMECHANISM. Pet

ent dated Jenuery 4, 1916. Disclaimer filed July 6, 1916, by thepatentee.

Enters tliis disclaimer to, and disclaims, the entire subject-matterclaimed in said Letters Patent.

[Ofiieial Gazette, July 11, 1.916.]

